Improvement in devices for converting motion



C. E. WILLIS.

DEVICE FOR CONVERTING MOTION.

1%. 175,805. Patented Apr114..1876,

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UNITED STATES PATENT QFFICE.

CHARLES E. WILLIS, or NEW YORK, N. Y."

IMPROVEMENT IN DEVICES FOR CONVERTING MOTION.

Specification forming part of Letters Patent No. 175,805, dated April 4,1876; application filed February 21, 1876.

To all whom it may concern:

Be it known that I, CHARLES E. WILLIS, of the city, county, and State ofNew York, have invented a new and Improved Universal Cam-Motion, ofwhich the followingis aspecification:

My invention relates to means for producing motion in any direction atthe will of the operatorsuch, for example, as is required for the feedof a sewing-machine, to sew in any direction without turning the work,and for other like purposes. It consists of a cam in a tubular or othersupport capable of turning on its axis, and surrounded by areciprocating ring, to any part of which the cam is presented by theturning of the tube, so as to be worked in any direction. The motion istransm ,mitted in some cases from the cam by an arm to which one end ofa bar is attached, which is mounted so as to both vibrate andreciprocate, and which works the feed or other device by its other end;but as this contrivance does not in all cases give, the motion instraight lines I have devised a combination of compound parallelbarmechanism with the cam, by which the feed or other device operated ismoved in straight lines in all cases. The cam is in this case contrivedin double form, by which it isworked positively in both directionswithout spring or weight; but it may be single and be worked in onedirection by a spring.

Figure l is a sectional elevation of my improved universal cammechanism, with the parallel-bar contrivaiice for transmitting themotion, taken on the line w as of Fig. 1. Fig. 2 is a top view ofFig. 1. Fig.3 is a plan of the same, showing the arrangement of thesingle bar for transmitting the motion; and Fig. 4 is a section of Fig.3, taken on line y 3 Similar letters of reference indicate correspondingparts.

A represents the cam, which is pivoted at B within the supporting-tubeO, which is capable of turning freely on its axis; but the support need'not necessarily be tubular. D is the ring or hollow cross-head forworking the cam; it is fitted on the exterior of the tube so as to slidefreely, and will in practice be operated by any approved means. The pibjection's E of the cam extend out through the slot B, one on each sideof the ring, so as to be alternately worked out and in as the ring movesforward and backward along the curve G. The tube will have worm-gears orother devices connected with it for turning and setting, according tothem direction it is wanted to work the cam, and an indicator may beapplied to assist in adjusting it accurately. H is the arm fortransmitting the H10- tion from the cam, said arm being connected to oneend of the lazy-tongs or parallel-bar contrivancc I, fixed on a pivot atJ, and designed to connect at its other end, K, with the feed or otherdevice to be worked.

The parallel-bar mechanism will be used when more exact work isrequired; but for such as is not importantin this respect a simple bar,L, will be used, said bar being arranged in a guide, M, in which it canslide lengthwise, the guide being fixed on a pivot, N, so that it canoscillate; or the bar may be fixed on the pivot N by a slot, 0, withoutthe guide.

When the bar L is to be used to work a feeder for sewing-machines it maybejointed, as at P, or in any other approved way, in order that it mayrise and fall to allow of the up'and-down motion of the feeder, and itmay be employed for giving that motion also by a cam, Q, if desired.

Having thus described my invention, I claim as new and desire to secureby Letters Patent 1. The combination of cam A, revolving support 0, andreciprocating ring D, substantially as specified.

2. The reciprocating ring D, combined and arranged with double cam A,having two projections, E, substantially as specified.

3. The combination of the parallel-bar frame I and the variable cam A,substantially as specified.

oHAs. E. WILLIS.

Witnesses:

'1. B. MOSHER, ALEx. F. ROBERTS.

